PLYMOUTH, N.H. (AP) - The head of a state council says New Hampshire could face an economic crisis if it doesn't revitalize its water system infrastructure.

John Gilbert is chairman of the state Water Council, which represents public and private interests, along with a number of state agencies. At a recent conference at Plymouth State University, he estimated it will cost nearly $3 billion over 10 years to repair the state's waste and storm water treatment plants, water utilities and underground piping, and argued that doing nothing will create major problems.

Gilbert says upgrading storm water systems could ultimately save money because doing so could prevent costly property damage such as road and bridge washouts.